The mausoleum of Osman Gazi, the founder of the Ottoman Empire, is located in Bursa and today is situated in the Tophane neighborhood.
According to the introductory sign at the entrance of Osman Gazi Tomb, “During the siege of Bursa, Osman Gazi (b.1258 – d.1326) showed his son Orhan Gazi the domed structure in the city and said “Son; when I die, put me under that silver dome in Bursa”. This domed structure is the chapel of the Saint Elie Monastery on the left side at the entrance of Tophane Park. After the conquest of Bursa, the chapel was converted into a mausoleum and Osman Gazi was buried here upon his will. The mausoleum was completely destroyed in the earthquake of 1855. It was then rebuilt in 1863 during the reign of Abdülaziz. This mausoleum was once known as the Davullu Monastery because a large drum and rosary beads presented to Osman Gazi by the Seljuk Sultan Alaaddin were displayed here. It is believed that these were destroyed by fire and earthquakes.
The magnificent wooden cist with mother-of-pearl inlay in the center of the octagonal tomb covered with a dome belongs to Osman Gazi. In addition, Savcı Bey, the son of Sultan Murad I, Alaaddin Bey, the son of Osman Gazi, Aspurçe Hatun, the wife of Orhan Gazi, and İbrahim Bey, the son of Orhan Gazi, and 12 unknown cists are located in the tomb.”